nylon straps are actually better as the dont tear up the finishes and are equally as strong as steel as i can attest too.
I made a similar comment when I saw your hoist setup. Anyway I get what you are saying. Good point about marring the finish. But there are dedicated pickup points that you can hook to without causing damage. Don has a pic on here somewhere. I have a 20’ nylon strap rated at 40K lbs but I wouldn’t use it with an engine hoist.
Anyway just a friendly observation, not trying to play Mr. Safety.